assembly strlen

section .text
    [GLOBAL stringlen:] ; C function

stringlen:  
    push ebp
    mov ebp, esp        ; setup the stack frame

    mov ecx, [ebp+8]

    xor eax, eax        ; loop counter


startLoop:
    xor edx, edx
    mov edx, [ecx+eax]
    inc eax

    cmp edx, 0x0 ; null byte    
    jne startLoop
end:    
    pop ebp

    ret

Posted by: Guest on August-31-2021

Source

section .text [GLOBAL stringlen:] stringlen: push ebp mov ebp, esp mov edx, [ebp+8] ; the string xor eax, eax ; loop counter jmp if then: inc eax if: mov cl, [edx+eax] cmp cl, 0x0 jne then end: pop ebp ret

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